Hood holder for electric lamps



June ,1 1926. 1,586,703

H. RITHNER HOOD HOLDER FOR ELECTRIC LAMPS Filed Nov. 20, 1924 fig 5' I Patented June 1, 1926.

UNITED sra'rss PATENT FFICE.

HOOD HOLDER FOR ELECTRIC LAMIPS.

Application filed November 20, 1924.

This invention relates broadly to hoods for electric lamps, and more specifically to a hood for light bulbs and attaching means therefor.

The primary object. of the invention is to provide a glass hood of that type commonly employed for embracing or enclosing the lamps of electric signs, and simple, eflicient and improved means whereby the hood is yieldingly mounted upon and supported by alamp.

A further object is to provide a hood having attaching means which not only maintains it firmly in its applied position, but also provides for its ready and convenient application to and removal from a lamp.

In describing the invent-ion in detail, reference is herein had to the accompanying drawings, in which Figure 1 is a sectional elevation of the invention, applied;

Figure 2 is a plan view of the attaching member Figure 3 is a view similar to Fig. 1, showing a modified form of the invention;

L Figures 4 and 5 are, respectively, a side elevation and a plan view of a modified form of attaching member or ring.

Referring to said drawings, 1 indicates an ordinary form of electric lamp of the type commonly employed in electric signs, and 2 designates a preferred form of hood for such a lamp. Said hood is made of colored or translucent glass and is shaped to constitute an enclosure for the larger outer end portion of the lamp, being designed to color the transmitted light rays emanating from -the lamp filament. Said hood has an internal diameter slightly greater than the great est diameter of the lamp and is provided with an internal annular shoulder 3 which, in the preferred short form of hood shown in Fig. 1, is located adjacentto the open end, or mouth, of the hood.

An open ring 4 formed of resilient wire is employed as an attaching device and retainer for the hood 2 which is adapted to he slipped into place upon the lamp without re Serial No. 751,140.

portions 6 of the rearwardly extending fingers occupy seated gripping relation to the lamp at points located rearward with respect to said shoulder and also with respect to the line of the greatest. circumferential dimension of the lamp.

T he ring 4 being first fitted in place withinth: hood, the latter is applied to the lamp by forcing it axially rearward over the outer end of the lamp. As the hood is being so forced into place, the finger portions 6 are gradually expanded through engagement therewith until. they have passed over the greatest circumference of the lamp, whereupon said fingers contact upon the lamp, gripping the latter With such pressure that the therewith interlocked hood is thereby firmly supported in place. During application of the hood, as aforesaid, the wire ring is forced forward within the hood away from the shoulder 3 to the extent that wedging of the ring between the lamp and said shoulder is prevented. l/Vhen, however, the hood is retracted, as for withdrawing it from the lamp, the ring becomes wedged between said shoulder and the lamp and thus effectively resists such withdrawal, either by chance or design. To effect intended withdrawal, one end of the ring must first be grasped by hand and drawn out in the direction of the lamp base, thus gradually to strip lengthwise said ring from the hood, whereupon the latter is wholly freed. To facilitate such freeing of the hood, one end of the ring is extended rearward so that it will lie outside the hood mouth and is bent to form a hook 7 which is adapted to rest upon or against the mouth-end of the hood when the latter is mounted on the lamp, as shown in Fig. 1.

1 11 the modification shown in Fig. 8, the hood 2* is made of such greater length and depth that it will enclose substantially the entire lamp 1. Such hood has formed therein an internal annular rib which affords a. shoulder 3 for the retaining ring 1*, said rib being located at such a depth in said hood that the therewith-engaged ring will occupy proper position for gripping the lamp rearward of and adjacent to the por tion of the lamp having the greatest circumference. Also, the ring 45* has a long rearward extension 8 at one end thereof terminated by a hook 7 for overlying the edge of the mouth of the hood, as shown in Fig. 2, said extension and hook constituting a pull member which may be grasped by hand to etl'ect stripping of the ring from the hood when removal of the latter is sought.

The 'modified form of retaining ring shown in Figs. 4 and is designed yieldingly to resist removal from the lamp of the hood to'which it is applied and at the same time to permit of forcible removal, it de sired, without detaching it from the hood. Said ring, which preferably has its ends joined by a sleeve-like clip 9, comprises relatirely long base portions 5 which are adapted to seat forward of the annular shoulder of the hood, and a plurality of short rearwardly and in ardly inclined V-shapedlhn gers (3 adapted to seat in yieldingly gripping; relation to the lamp; In withdrawing the hood which carries said ring, the graduall expanding pressure to which the tin- 5 (5 are subjected acts to force the ring forward within the hood slightly, or to the extent that the tips of said lingers ap proach the shoulder of the hood so closely that they areallowelil to pass by the greatest diameter of the imp without wedging.

hat is claimed is 1. A hood retainer for electric lamps, con'iprising, in combination with a hood having an internal'annular rib forming a shoulder, a resilient wire ring adapted to be sprung into and out of expanded seating relation to the hood 'alls inward of said shoulder, said ring being shaped to form alternate inwardly and outwardly extendin inclined fingers, of which the inwardlv extendingfingers yieldingly engage the hood and the outwardlyextending fingers are adapted yieldingly to en a lamp en- 'closed by said hood.

A hood retainer for electriclamps, comprising, in combination with a hood having an interna annular shoulder, an open resilient wire ring for seating within said hood inward of said shoulder and haring lingers for yieldingly gripping a lamp onclosed by said hood, one of the ends of said ring, being directed outward and engaged with the edge of the mouth portion at the hood. 7

A hood retainer :tor electric lamps, comprising, in combination with a hood having an internal annular shoulder, an open resilient wire ring for seating within said hood inward of said shoulder and having; fingers for yieldingly gripping a lamp en closed by StlCl hood, one of the ends of said ring being directed outward and having formed thereon a terminal hook adapted to seat upon the edge of the mouth portion of the hood.

In testimony whereof, I afiix my signature.

HENRY BITHX l'l ll. 

